eadhaw

The funtion of colormap2label may not be effective , the converted label does not correspond.

4

[test-rgb2label.pdf](https://github.com/TrickyGo/Dive-into-DL-TensorFlow2.0/files/5728510/test-rgb2label.pdf) The result for [0,0,128] should be labeled as 4, but got the 0. Hope to get your reply, thank you! The input image from VOC2012\SegmentationClass\2007_000061.png